Here you need to analyze if client wants multiple records in a given time, or one at any given point of time or once created can never be deleted etc. depending on that you must assign the TC. For ex if client gives more than one sap user ids for a person at a given point of time there must be multiple records so obviously tc0 and tc1 and tc2 can not be assigned to such subtypes. It is tc3. like that.

TC-0 one record only, (once created cant be deleted cant be changed)
TC-1 one record created but can be delimited (basically 1 records that can be changed but not deleted)
TC-2 multiple records but without overlapping (again 0 or 1, but you can keep changing, deleting)
TC-3 0 one or multiple records(delimit, delete and multiple entries permitted)